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XVME-400/40 I /490/49 1 Manual
October, 1989
2.4.2 Address Modifier Jumper (Jl or J7)
Each XVME-400/401/490/491 Module has one jumper that determines which address
modifier codes it
will
respond to. This jumper is Jl on the XVME-400/490 and J7 on the
XVME-401/491 (see Figures 2-1, 2-2, 2-3, and 2-4 for the jumper location). When this
jumper is in, the module will respond to supervisory short I/O bus cycles only. When this
jumper is out, the module will respond to both non-privileged and supervisory short I/O
bus cycles.
Table 2-4 shows the relationship between this jumper and the address
modifiers.
Table 2-4. Addressing Options
Jumper Address Modifier to which the XVME-400/40l/490/491
J1 (XVME-400/490), or Module will respond
J7 (XVME-401/491)
In (2DH) Supervisory only
Out (2DH) Supervisory or (29H) Non-privileged
2.4.3 Interrupt Level Selection Jumpers (JAl-JA3)
The XVME-400/401/490/491 Module can either be configured to generate VMEbus
interrupts at levels 1-7 or the module interrupt capability can be completely disabled.
Table 2-5 shows how jumpers JAl-JA3 are used to determine the interrupt level status for
the XVME-400/40l/490/491 Module.
Table 2-5. Interrupt Level Jumper Positions
JA3 JA2
In In
In In
In
out
In out
out In
out In
out out
out out
JA1
In
out
In
out
In
out
In
out
Interrupt Level Selected
None, VMEbus Interrupter disabled
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
The module is shipped from the factory with jumpers
JAl, JA2,
and JA3 installed.
NOTE
If the module is never required to generate interrupts, JAI, JA2, and
JA3 should be installed to ensure that a programming bug will not
generate a VMEbus interrupt.
2-8